What price point are you basing this all on? Because there's a threshold there, is there not?

Humans absolutely have work limits that companies would love to exceed but they don't because lawsuits and work injuries cost them.

Also, the robot can work 168 hours a week - few hours for maintenance.

So human working on production costs:
(I'll be rounding up here)

40k a year in wage.
5k+ in worker taxes the company pays
facilities, parking, etc = unaccounted because same can go for robotics, to a smaller degree imo but i'm not going to write a research paper on reddit.

Robot:

50k Upfront

Power:
250w(=16.8/week @ 0.40/kwh, 873.60/year)
500w(~1750/year)

Maintenance = 20% / year of purchase price seems like a strong number
10k/year

= 12k/year

And with mostly robots, you need less managers to manage the humans. Smaller HR department, less legal issues, less workplace investigations, less PR over how you abused your workers. Then to top that, you can get more work per year from a robot that can do 50% the speed of a human.

So lets calculate total work hours for a human doing quad shifts (we'll combine 4 people into one here)

45k/year for 40 hour weeks, 160 hours for 4 people.

The human cost: 180k / year + unexpected
The Robot Cost: 12k/year at 500w

Even if you absurdly increase the robot cost, we're talking huge savings.

The even trade point here over a worker, the robot would have to cost almost a million dollars(900k), with that 20% maintenance rate. So, spending 180k / year to repair it.

Humans are expensive, we have yet to learn the productivity rate of any specific robot yet, and that'll be the determining factor, but we can calculate how much it has to cost to be worth replacing humans if it's 1:1 productivity rate.